JPH064823A - Head device - Google Patents

Abstract

PURPOSE:To improve the reliability of the head device by increasing the margin for preventing a reproducing head from deviating from a recording track. CONSTITUTION:The relative positions of recording gaps 5 which are formed on the head 1 and can record signals on a tape and reproducing gaps 7 which can reproduce the signals are so disposed that the reproducing heads do not deviate from the recording track at the time of reproducing by shifting or varying these positions. As a result, the margin to prevent the reproducing gaps from deviating from the recording track is increased and the reproduced outputs are increased as well in the case of reproduction of the signals recorded on the tape by the recording gaps.

Description

Detailed Description of the Invention

[0001]

The present invention is used in a magnetic recording / reproducing apparatus capable of recording / reproducing music, information, etc.
The present invention relates to a head device intended for reliable reproduction.

[0002]

2. Description of the Related Art A conventional head device will be described below. FIG. 16 is a perspective view of a conventional head device as seen obliquely from above, and FIG.
FIG. 18 is an enlarged front view of a main portion for explaining the positional relationship between the recording track and the reproduction gap, and FIG. In FIG. 16, reference numeral 29 is a head, 30 is a tape guide, and a regulating portion 30a, a biasing portion 30b, and a sliding contact portion 30c are provided on the left and right to guide the tape 31 advancing in the direction of the arrow and at the same time with respect to the head 29. Position the tape in position. A recording gap for recording a signal on the tape 31 and a reproducing gap for reproducing the recorded signal are provided on a portion (L) on the front surface of the head 29 which is in contact with the tape 31. As shown in FIG. 17, 32 is a recording core, a recording gap 33 is formed between the two recording cores 32, 34 is a reproducing core, and a reproducing gap 35 is formed between the two reproducing cores 34. ing. In FIG. 18, reference numeral 36 is a recording track, and one recording track 36 is recorded by one recording gap 33, and a reproduction gap is formed so as to be paired with the recording gap 33.
The signal is reproduced as 35 passes over the recording track 36. A plurality of pairs of recording gaps 33 and reproducing gaps 35 are provided to record / reproduce a plurality of tracks. When the signal is reproduced, the recording gap 33 is longer than the reproducing gap 35 in the tape width direction as shown in FIG. 17, so that the signal is recorded on the tape by the recording gap 33 as shown in FIG. The reproduction gap 35 is located at the center of the recording track 36, and the distances M1 and M from the end of the reproduction gap 35 in the tape width direction to the end of the recording track 36.
2 is equal.

[0003]

However, in the above-mentioned conventional configuration, the reproducing gap 35 does not deviate from the recording track 36 when the position of the tape on which the recording track 36 is recorded is deviated in the tape width direction for some reason. Figure 1 shows the margin
As shown in FIG. 8, the margins are M1 and M2, and the margins at that time are equal regardless of which direction the tape width is deviated. However, the amount of displacement of the tape in the M1 direction and the amount of displacement of the tape in the M2 direction are not necessarily equal due to the configuration of the tape guide or the like, and there is little margin in the direction where the displacement amount is large.

Further, in the case of a search in which the recorded signal is read at a high speed to find the beginning of a song, the effect of tape positioning by the tape guide is reduced, and the amount of tape deviation is further increased. In addition, the contact pressure between the head and the tape is also small, so that the reproduction output becomes unstable. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, to increase the margin for tape displacement, and to provide a head device which can obtain stable output.

[0005]

In order to achieve the above object, the present invention provides, in the first invention, a head device capable of recording and / or reproducing a signal, which is provided in the head,
A plurality of recording gaps for recording signals on a tape and a plurality of reproduction gaps provided on the head for reproducing signals recorded on the tape, wherein the plurality of reproduction gaps and the plurality of recording gaps are relative to each other; A head device is provided in which the position is deviated in the tape width direction and the reproduction gap of this deviation is expanded so as not to protrude from the recording track.

According to a second aspect of the invention, in a head device capable of recording and / or reproducing a signal, the head device is provided in the head,
The tape has a plurality of recording gaps for recording signals, and at least one of the plurality of recording gaps has a length in the tape width direction different from that of the other recording gaps, and the reproduction gap is out of the recording track. The head device has a wide margin.

According to a third aspect of the invention, in a head device capable of recording and / or reproducing a signal, the head device is provided in the head,
A plurality of reproduction gaps for reproducing the signal recorded on the tape are provided, and at least one reproduction gap of the plurality of reproduction gaps has a length in the tape width direction different from other reproduction gaps, and the different reproduction gaps are provided. The head device has a wider margin so that it does not protrude from the recording track.

According to a fourth aspect of the invention, in a head device capable of recording and / or reproducing a signal, the head device is provided in the head,
A plurality of recording gaps for recording a signal on a tape and a plurality of reproducing gaps provided on the head for reproducing the signal recorded on the tape are provided, and at least one reproducing gap among the plurality of reproducing gaps is provided. By making the length in the tape width direction different from other reproduction gaps, and making the length in the tape width direction of at least one recording gap among the plurality of recording gaps different from other recording gaps, The head device has a wide margin so that the reproduction gap does not protrude from the recording track.

[0009]

In the first aspect of the present invention, the head is provided with a plurality of recording gaps and a plurality of reproducing gaps, and the plurality of reproducing gaps are biased in the tape width direction with respect to the plurality of recording gaps. Due to the structure of the tape guide, the running tape tends to be biased in one direction, and by biasing the reproduction gap in this direction, the margin for protruding from the recording track becomes large.

In the second invention, among the plurality of recording gaps,
By making the length of at least one recording gap in the tape width direction different from other recording gaps, the recording track of a recording gap of a different length is larger than the reproducing gap of the same length. In response to the bias of the tape, it is now possible to have a large margin to prevent the tape from protruding from the recording track.

[0011]

【Example】

(First Embodiment) A first embodiment of the head device of the present invention will be described below with reference to the drawings. 1 is a perspective view of the head device of the present invention seen from the upper front side, and FIGS. 2 and 3 show the positional relationship between the recording gap and the reproducing gap.
FIG. 4 to FIG. 6 are side views showing the positional relationship between the tape guide and the tape, and FIGS. 7 to 8 are detailed views showing the positional relationship between the recording track and the reproducing gap.

In FIG. 1, 1 is a head, 2 is a tape guide, which are provided on the left and right sides of the head 1, each having a restricting portion 2a, a biasing portion 2b, and a sliding contact portion 2c, in the direction of the arrow. The tape 3 running on the head is guided and positioned so as to pass a predetermined position with respect to the head 1. Since the length of the sliding contact portion 2c sandwiched between the regulating portion 2a and the biasing portion 2b in the tape guide 2 is shorter than the width of the tape 3, the tape guide 2 has an angle with respect to the tape surface as shown in FIG. Force 2b
Due to this, the tape 3 is deformed. Due to this deformation of the tape 3, a force in the direction of the regulating portion 2a is generated with respect to the tape 3, and the tape 3 is positioned at a predetermined position with respect to the head 1.

The recording and reproducing gap provided in the head 1 will be described with reference to FIGS. 2 and 3. A recording core 4 is provided in the head 1, and a recording gap 5 is formed in the center. A reproduction core 6 has a reproduction gap 7 formed in the center. The reproduction cores 6 and 6 are formed to be paired with the recording cores 4 and 4. Next, the positional relationship between the recording gap 5, the reproduction gap 7, and the recording track 8 recorded on the tape 3 by the recording gap 5 and the reproduction gap 7 will be described with reference to FIGS.

In the tape guide 2 shown in FIG. 4, since the length of the sliding contact portion 2c sandwiched between the regulating portion 2a and the urging portion 2b is shorter than the width of the tape 3, a certain angle B with respect to the tape surface is obtained.
The tape 3 is deformed by the urging portion 2b having the shape. Due to this deformation of the tape 3, a force in the direction of the regulating portion 2a is generated with respect to the tape 3, and the tape 3 is positioned at a predetermined position with respect to the head 1. Therefore, FIG. 4 shows a state where the tape is not biased, and FIGS. 5 and 6 show a state where the tape is biased to one side. Also,
FIG. 7 shows the case where the reproduction gap 7 is not biased with respect to the recording track 8, and FIGS. 8 and 9 show the case where it is biased to one side.

In this embodiment, in FIG. 2, the reproducing gap 7 is offset from the recording gap 5 in the tape width direction and in the direction of the regulating portion 2a by N1. Therefore, as shown in FIG. 8, the margin for preventing the reproducing gap 7 from protruding from the track 8 recorded by the recording gap 5 is closer to the biasing portion direction than the margin C in FIG. The margin D is increased by N1. That is, FIG.
When the tape 3 is displaced in the direction of the urging portion 2b due to variations in various conditions such as the angle of the urging portion 2b provided on the tape guide 2 as shown in FIG. The margin D for preventing the gap 7 from protruding from the recording track 8 becomes large. Also, when the reproducing gap 7 is biased by N2 in the opposite direction to the recording gap 5 as shown in FIG. 3, the worst tape 3 is deformed by abutting against the regulating portion 2a as shown in FIGS. 6 and 9. It goes without saying that the margin E for preventing the reproduction gap 7 from protruding from the recording track 8 becomes large when the reproduction gap 7 is displaced in the direction. (Second Embodiment) A second embodiment of the head device of the present invention will be described with reference to the drawings.

FIG. 10 is an enlarged front view of the head 1, 9 is a first recording core provided in the head 1, and 10 is a first recording gap, which is formed by the first recording core 9. Reference numeral 11 is a second recording core provided in the head 1, 12 is a second recording gap formed by the second recording core 11, 13 is a pair with the first recording gap 10 and the second recording gap 12. The reproducing core 14 and the reproducing gap 14 are formed by the reproducing core 13.

Next, the positional relationship between the first recording gap 10 and the reproducing gap 14 and the recording track 8 recorded on the tape 3 by the first recording gap 10, the second recording gap 12 and the reproducing gap 14, Second recording gap 12
The positional relationship of the recording tracks 8 recorded on the tape 3 will be described with reference to FIGS. 10 to 11. In the present embodiment, as shown in FIG. 10, the first recording gap 10 is longer than the second recording gap 12 in the tape width direction. Therefore, as shown in FIG. 11A, as compared with the margin F for preventing the reproduction gap 14 from being displaced from the recording track 8 recorded on the tape 3 by the second recording gap 12, FIG. As shown in the figure, the margin G for preventing the reproducing gap 14 from being displaced from the recording track 10a recorded by the first recording gap 10 is larger. In other words, when the recording track 10a recorded by the recording gap 10 is reproduced by the reproducing gap 14, there is a large margin for the positional deviation of the tape 3 due to the structure of the tape guide as shown in FIGS. Is. Therefore, when the recording track 10a recorded by the first recording gap 10 is reproduced, there is more margin for the positional deviation of the tape with respect to the head when the tape 3 is run at a high speed due to the beginning of the music. Is getting bigger. (Embodiment 3) A third embodiment of the head device of the present invention will be described with reference to the drawings.

FIG. 12 is an enlarged front view of the head as seen from the front. Reference numeral 15 is a first reproduction core provided in the head 1, 16 is a first reproduction gap formed by the first reproduction core 15, and FIG.
Reference numeral 17 is a second reproduction core provided in the head 1, 18 is a second reproduction gap formed by the reproduction core 15, and 19 is a pair formed with the first reproduction gap 16 and the second reproduction gap 18. The recording core 20 is a recording gap formed by the recording core 19.

Next, the first reproduction gap 16, the recording gap 20, and the positional relationship between the recording tracks 8 recorded on the tape 3 by the recording gap 20 and the second reproduction gap
The positional relationship between 18 and the recording gap 20 and the recording track 8 recorded on the tape 3 by the recording gap 20 will be described with reference to FIG. In this embodiment, FIG.
As shown in (a) and (b), the first reproduction gap 16 is shorter than the second reproduction gap 18 in the tape width direction. Therefore, as shown in FIG. 13 (a), the tape 3 is formed by the recording gap 20.
The second reproduction gap from the recording track 8 recorded above
The margin H for keeping the first reproduction gap 16 from the recording track 20a recorded by the recording gap 20 is larger than the margin F for keeping 18 in place. That is, when the recording track 20a recorded by the recording gap 20 is reproduced by the first reproducing gap 16, there is a larger margin for the positional deviation of the tape with respect to the head as shown in FIGS. . (Embodiment 4) A fourth embodiment of the head device of the present invention will be described with reference to the drawings.

FIG. 14 is an enlarged front view of the head as seen from the front, where 21 is a third reproducing core provided in the head 1, 22 is a third reproducing gap formed by the third reproducing core 21, and
Reference numeral 23 is a third recording core formed so as to be paired with the third reproduction gap 22, 24 is a third recording gap formed by the third recording core 23, and 25 is provided in the head 1. A fourth reproduction core, 26 is a fourth reproduction gap formed by the fourth reproduction core 25, and 27 is a fourth reproduction gap 26.
And a fourth recording core 28 formed to be paired with the fourth recording core 28.
4 is a fourth recording gap formed by the recording core 27 of FIG.

Next, the positional relationship between the third reproducing gap 22, the third recording gap 24, and the recording track 8 recorded on the tape 3 by the third recording gap 24, and the fourth
The positional relationship between the reproduction gap 26, the fourth recording gap 28, and the recording track 8 recorded on the tape 3 by the fourth recording gap 28 will be described with reference to FIGS. 14 and 15.

In the present embodiment, as shown in FIG. 14, the third reproducing gap 22 is longer than the fourth reproducing gap 26 in the tape width direction, and the third recording gap 24 is the fourth recording gap 28. Longer than the tape width. Therefore, as shown in FIG. 15 (a), the margin F and the third recording gap 24 are provided so that the fourth reproducing gap 26 does not deviate from the recording track 8 recorded on the tape 3 by the fourth recording gap 28. It is possible to obtain a large reproduction output while keeping the same margin I for keeping the third reproduction gap 22 from coming off from the recorded recording track 22a.

[0023]

As described above, according to the first aspect of the present invention, when the signal recorded on the tape is reproduced by the recording gap by relatively biasing the reproducing gap and the recording gap, the recording track is recorded. It is possible to provide a head device capable of improving reliability by increasing a margin for preventing the reproduction gap from coming off.

Further, according to the second aspect of the invention, by making at least one recording gap longer than the other recording gaps, the tape for the head when the tape is run at a high speed for the beginning of a song or the like is reached. Reliability is improved by increasing the margin for preventing the reproduction gap from being displaced from the recording track with respect to the position shift. According to the third aspect of the invention, by making at least one reproduction gap shorter than the other reproduction gaps, it is possible to prevent misalignment of the tape with respect to the head when the tape is run at a high speed for the beginning of a song. As a result, the margin for keeping the playback gap from the recording track is increased and the reliability is improved.

According to the fourth aspect of the invention, at least a pair of the reproduction gap and the recording gap are made longer than the other reproduction gap and the recording gap to record the signal recorded on the tape by the recording gap. A head device capable of obtaining a large reproduction output without sacrificing a margin for preventing the reproduction gap from coming off the track and improving reliability can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a head device showing an embodiment of the present invention as seen from above the front.

FIG. 2 is an enlarged front view of a recording gap and a reproducing gap of the same device.

FIG. 3 is an enlarged front view of a recording gap and a reproducing gap of the same device.

FIG. 4 is a side view of the tape guide showing a case where the tape is not biased.

FIG. 5 is a side view of the tape guide, showing a case where the tape is biased.

FIG. 6 is a side view of the tape guide showing a case where the tape is biased.

FIG. 7 is an explanatory diagram showing positions of a recording track and a reproduction gap.

FIG. 8 is an explanatory diagram showing the positions of a recording track and a reproduction gap.

FIG. 9 is an explanatory diagram showing positions of a recording track and a reproduction gap.

FIG. 10 is an enlarged front view of a recording gap showing a second embodiment.

11A and 11B are front views showing the relationship between the reproduction gap and the recording track of the second embodiment.

FIG. 12 is an enlarged front view of a recording gap showing a third embodiment.

13A and 13B are front views showing the relationship between the reproduction gap and the recording track of the third embodiment.

FIG. 14 is an enlarged front view of a recording gap showing a fourth embodiment.

15A and 15B are front views showing the relationship between the reproduction gap and the recording track of the fourth embodiment.

FIG. 16 is a perspective view of a conventional head device as seen from above the front.

FIG. 17 is an enlarged front view of a recording gap and a reproducing gap of a conventional head device.

FIG. 18 is an explanatory diagram showing the positions of recording tracks and a reproduction gap of a conventional head device.

[Explanation of symbols]

 1 head 3 tape 5, 10, 12, 20, 24, 28 recording gap 7, 14, 16, 18, 22, 26 reproduction gap 8, 10a, 20a, 22a recording track

Claims (4)

[Claims] 1. In a head device capable of recording and / or reproducing a signal, a plurality of recording gaps provided on the head for recording a signal on a tape, and a signal provided on the head and recorded on the tape are reproduced. A plurality of reproducing gaps, and biasing the relative positions of the plurality of reproducing gaps and the plurality of recording gaps in the tape width direction,
The head device is characterized in that the reproducing gap of this deviation is expanded so as not to protrude from the recording track. 2. A head device capable of recording and / or reproducing a signal, comprising a plurality of recording gaps provided on the head for recording a signal on a tape, and at least one recording gap among the plurality of recording gaps. The head device is characterized in that the length of the tape in the tape width direction is different from that of other recording gaps, and the reproduction gap is expanded so as not to protrude from the recording track. 3. A head device capable of recording and / or reproducing a signal, comprising a plurality of reproducing gaps provided on the head for reproducing a signal recorded on a tape, and at least one of the plurality of reproducing gaps. A head device characterized in that the length of the reproducing gap in the tape width direction is made different from that of other reproducing gaps, and the different reproducing gap is expanded so as not to protrude from the recording track. 4. A head device capable of recording and / or reproducing a signal, comprising: a plurality of recording gaps provided on the head for recording a signal on a tape; and the signal provided on the head and recorded on the tape. A plurality of reproduction gaps for reproduction, wherein at least one reproduction gap of the plurality of reproduction gaps has a tape width direction length different from other reproduction gaps, and at least one of the plurality of recording gaps. A head device characterized in that the length of the recording gap in the tape width direction is made different from that of other recording gaps, and by making these different gaps, the reproduction gap is expanded so as not to protrude from the recording track.